Geologic atlas of U.S.
Subtitle: Philadelphia folio (Norristown, Germantown, Chester, and Philadelphia quadrangles), Pennsylvania-New Jersey-Delaware.
Contributors: Bascom, F.; Clark, W. B.; Darton, Nelson Horatio, 1865-1948.; Knapp, G. N.; Kümmel, Henry Barnard, b. 1867.; Miller, Benjamin L.; Salisbury, Rollin D., 1858-1922.
Series: Geologic Atlas of U.S. Folio No. 162
Publisher: [s.n.]
Published: 1909
Place of publication: Washington, D.C
Format: Microform
Subjects: Geological mapping -- Pennsylvania.; Geological mapping -- New Jersey.; Geological mapping -- Delaware.